Generally speaking, collaborative divorce provides a better experience for all involved: you, your spouse and your kids. If possible, you want to get along and work together. That's how you get an outcome that makes everyone happy. It's how you create a low-conflict divorce that does not drag on unnecessarily.
That said, getting along with your spouse during a divorce is not always easy. Maybe they fell for someone else and asked you for a divorce, and you feel hurt and angry because of it. Maybe they have financial problems that you just couldn't deal with anymore, and they're angry that you wanted to split up.